CVE-2026-5271
Possible to hijack modules in current working directory
Description
pymanager included the current working directory in sys.path meaning modules could be shadowed by modules in the current working directory. As a result, if a user executes a pymanager-generated command (e.g., pip, pytest) from an attacker-controlled directory, a malicious module in that directory can be imported and executed instead of the intended package.
INFO
Published Date :
April 1, 2026, 2:16 p.m.
Last Modified :
April 7, 2026, 7:43 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 28c92f92-d60d-412d-b760-e73465c3df22 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Modify pymanager configuration to exclude the current working directory from sys.path.
- Ensure modules are loaded from intended locations only.
Public PoC/Exploit Available at Github
CVE-2026-5271 has a 5 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-5271.
| URL | Resource |
|---|---|
| https://github.com/python/pymanager/security/advisories/GHSA-jr5x-hgm4-rrm6 | Exploit Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2026/04/01/5 | Mailing List Third Party Advisory |
| https://github.com/python/pymanager/security/advisories/GHSA-jr5x-hgm4-rrm6 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-5271 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-5271
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-5271 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-5271 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 07, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:python:pymanager:26.0:*:*:*:*:*:*:* Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/04/01/5 Types: Mailing List, Third Party Advisory Added Reference Type CISA-ADP: https://github.com/python/pymanager/security/advisories/GHSA-jr5x-hgm4-rrm6 Types: Exploit, Vendor Advisory Added Reference Type Python Software Foundation: https://github.com/python/pymanager/security/advisories/GHSA-jr5x-hgm4-rrm6 Types: Exploit, Vendor Advisory -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Apr. 02, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/04/01/5 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 01, 2026
Action Type Old Value New Value Added CWE CWE-427 Added Reference https://github.com/python/pymanager/security/advisories/GHSA-jr5x-hgm4-rrm6 -
CVE Modified by [email protected]
Apr. 01, 2026
Action Type Old Value New Value Changed Description pymanager included the current working directory in sys.path meaning modules could be shadowed by modules in the current working directory. This could lead to modules getting shadowed pymanager included the current working directory in sys.path meaning modules could be shadowed by modules in the current working directory. As a result, if a user executes a pymanager-generated command (e.g., pip, pytest) from an attacker-controlled directory, a malicious module in that directory can be imported and executed instead of the intended package. -
New CVE Received by [email protected]
Apr. 01, 2026
Action Type Old Value New Value Added Description pymanager included the current working directory in sys.path meaning modules could be shadowed by modules in the current working directory. This could lead to modules getting shadowed Added CVSS V4.0 AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added Reference https://github.com/python/pymanager/security/advisories/GHSA-jr5x-hgm4-rrm6